6510/65816 Addressing mode: Stack (Push) -- s
(PHA,PHB,PHD,PHK,PHP,PHX,PHY)
(1 byte) (3 and 4 cycles)
+---------------+------------------+-----------------------+----------+
| Cycle | Address Bus | Data Bus |Read/Write|
+---------------+------------------+-----------------------+----------+
| 1 | PBR,PC | Op Code | R |
| 2 | PBR,PC+1 | Internal Operation | R |
| (1) 3a | 0,S | Register High | W |
| 3 | 0,S-1 | Register Low | W |
+---------------+------------------+-----------------------+----------+
(1) Add 1 cycle for M=0 or X=0 (i.e. 16 bit data).
See also: Abbreviations